| Item type |
デフォルトアイテムタイプ_（フル）(1) |
| 公開日 |
2023-03-18 |
| タイトル |
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タイトル |
Pressure effects on the phase transitions and energy gap in CeRhAs |
|
言語 |
en |
| 作成者 |
Umeo, K.
Masumori, K.
Sasakawa, T.
Iga, F.
Takabatake, Toshiro
Ohishi, Y.
Adachi, T.
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| アクセス権 |
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アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利情報 |
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権利情報 |
Copyright (c) 2006 American Physical Society |
| 内容記述 |
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内容記述 |
We report on the electrical resistivity, thermal expansion, and x-ray diffraction measurements of single-crystalline sample of the so-called Kondo semiconductor CeRhAs under pressures up to 3 GPa. This compound undergoes successive structural phase transitions at T1 = 360, T2 = 235, and T3 = 165 K at ambient pressure. On cooling below T1, the crystal structure changes from the hexagonal LiGaGe-type to the orthorhombic epsilon-TiNiSi-type with a 2b×2c superlattice. By applying pressure up to 1.5 GPa, T1 increases with a ratio of 270 K/GPa, whereas both T2 and T3 decrease with –100 K/GPa. The concurrent decrease of both the a parameter and the energy gap along the a axis with increasing pressure contradict the c-f hybridization gap model in which the gap is enlarged by the enhancement of hybridization between the 4f electrons and conduction band. Instead, a sort of charge-density-wave transition at T1 is proposed for the origin of gap formation of this compound. The semiconducting behavior in the resistivity vanishes when the phase with the 2b×2c superlattice decomposes into two orthorhombic phases below 100 K and above 1.5 GPa. |
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言語 |
en |
| 出版者 |
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出版者 |
American Physical Society |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 出版タイプ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 関連情報 |
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識別子タイプ |
DOI |
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関連識別子 |
10.1103/PhysRevB.71.064110 |
| 関連情報 |
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関連タイプ |
isVersionOf |
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識別子タイプ |
DOI |
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関連識別子 |
http://dx.doi.org/10.1103/PhysRevB.71.064110 |
| 収録物識別子 |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
1098-0121 |
| 収録物識別子 |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA11187113 |
| 開始ページ |
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開始ページ |
064110 |
| 書誌情報 |
Physical Review B
Physical Review B
巻 71,
p. 064110,
発行日 2005
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| 旧ID |
14995 |
PhysRevB064110.pdf (813.0 KB)
